The morphology, thermal property, and failure mechanism of GdNdZrO thermal barrier coatings by EB-PVD

被引：3

作者：

Shen, Zaoyu ^{[1
]}

Liu, Zheng ^{[1
,2
]}

Liu, Guanxi ^{[1
]}

He, Limin ^{[1
]}

Mu, Rende ^{[1
]}

Xu, Zhenhua ^{[1
]}

机构：

[1] Aero Engine Corp China, Key Lab Adv Corros & Protect Aviat Mat, Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing, Peoples R China

来源：

INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2021年 / 18卷 / 05期

关键词：

EB‐ PVD; failure; GdNdZrO; thermal barrier coatings; thermal property; MICROSTRUCTURE; OXIDATION; EVOLUTION; SCIENCE; TBCS;

D O I：

10.1111/ijac.13738

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nowadays, the Gd2Zr2O7 thermal barrier coatings (TBCs) have been evaluated as a promising alternative to yttria-stabilized zirconia (YSZ). Thus, this investigation focuses on the thermal property, morphology, and failure mechanism of double ceramic layers (DCLs) GdNdZrO/YSZ advanced TBCs. The GdNdZrO coatings with columnar morphology have been deposited on NiCoCrAlYHf bond coating using an electron beam physical vapor deposition method. Material characterizations mainly include X-ray diffraction, scanning electron microscope, and transmission electron microscopy. The thermal conductivity of GdNdZrO ceramic material is 0.494 W/mK at 1200 degrees C. The thermal shock life of GdNdZrO/YSZ TBCs shows an average shock life of 5235 cycles. The TBC degradation occurs on the crack area within thermally grown oxide layer leading to the interface instability. The interface broken might play an important role in the failure mechanism of TBCs.

引用

页码：1623 / 1629

页数：7

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